Alvolta Auto-Reset Circuit Breaker 40A with Red Cover

Auto-Reset Circuit Breaker Plastic W/Red Cover

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Alvolta Auto-Reset Circuit Breaker 40A with Red Cover

Surface mount circuit breaker with M5 terminal studs and insulated cover

$ 2.45 - Inc GST 2.45 AUD $ 2.45

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Brand: Alvolta

SKU: AC1240

Category: Circuit Protection , Circuit Breakers , Surface Mount

Features

40 A
Automatic reset circuit breaker
Surface mount
Suitable for 12 - 24 V systems
IP67 rated
M5 terminal studs
Insulated cover included

Where to use it

Alvolta auto-reset circuit breakers are designed for use in applications where a temporary, transient overload is expected and manual resetting would be inconvenient, such as in automotive, marine, or RV applications for things like headlights, power windows, or trailer brakes. They are also useful for circuits in hard-to-reach areas or off-grid systems like cabins, where frequent manual resetting would be difficult.

Dimensions

Width	21 mm
Length	51 mm
Height	35 mm
Weight	0.03 kg

Compliance

SAE J553
IP67

Warranty

5-year warranty

Applications

Marine

RV's

Caravans

Off-Grid Systems

Tiny Houses

Cabins

About Alvolta

Australian-owned and operated and driven by a passion for excellence, Alvolta offers unwavering performance and durability even in harsh Australian conditions. Alvolta specialises in precision-engineered DC components, designed to enhance off-grid adventures. Their commitment to delivering superior power performance with uncompromising quality is evident in their lineup of solar panels, solar charge controllers, circuit protection devices, mounting solutions, tools, and more. Supply yourself with all the arsenal you need to extend your power supply and adventure for longer with Alvolta.

Specifications

Brand

Alvolta

An auto-reset circuit breaker is a protective device that automatically interrupts electrical current when a fault or overload occurs, then resets itself once the fault clears. Unlike manual or fuse-based protection, it doesn’t need to be replaced or reset by hand, making it ideal for 12V and 24V systems commonly used in vehicles, caravans, and boats.

Auto-reset circuit breakers are commonly used in automotive, marine, and off-grid applications, including 4WDs, camper trailers, caravans, and boats. They’re perfect for circuits where occasional short-term overloads occur, such as lighting, pumps, or accessory circuits, and where easy, continuous protection is required without manual resetting.

An auto-reset breaker automatically restores power once it cools down after tripping, while a manual-reset breaker stays off until it’s manually reset by pressing a button or flipping a switch. Auto-reset types are great for non-critical loads, while manual-reset breakers are preferred for safety-critical systems where you need to identify and fix the fault before restoring power.

To select the correct breaker rating, match the amperage to your circuit’s expected continuous current draw, which is typically about 125% of the load current. For example, if your circuit draws 8A continuously, use a 10A breaker. Always refer to manufacturer guidelines and consider the wire size and device specifications for safe protection.

Many auto-reset circuit breakers are designed for dry environments, but weatherproof or sealed versions are available for marine, off-road, or outdoor use. If your installation is exposed to moisture, dust, or vibration, choose a breaker with a sealed housing or IP-rated protection to ensure long-term reliability.

Product Specifications

Model	AC1240
Amperage	40 A
Voltage	>28 V DC
Mounting	Surface
Function Type	Thermal trip-free, cycling
Poles	1
Interrupt Rating	2.5 Kva
Material	Plastic
Class	Type I
Terminal Stud	M5
IP Rating	IP67
Mounting Holes	M4
Dimensions	51 x 21 mm
Weight	0.03 kg
Warranty	5 Years

Alvolta Auto-Reset Circuit Breaker 40A with Red Cover

$ 2.45 - Inc GST 2.45 AUD $ 2.45

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